399889041 has 8 divisors (see below), whose sum is σ = 536457120. Its totient is φ = 264956832.

The previous prime is 399889027. The next prime is 399889069. The reversal of 399889041 is 140988993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 399889041 - 2⁷ = 399888913 is a prime.

It is a super-2 number, since 2×399889041² = 319822490223799362, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (399889141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408396 + ... + 409373.

It is an arithmetic number, because the mean of its divisors is an integer number (67057140).

Almost surely, 2^399889041 is an apocalyptic number.

It is an amenable number.

399889041 is a deficient number, since it is larger than the sum of its proper divisors (136568079).

399889041 is a wasteful number, since it uses less digits than its factorization.

399889041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817935.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 399889041 is about 19997.2258325999. The cubic root of 399889041 is about 736.7381640190.

It can be divided in two parts, 3998 and 89041, that added together give a palindrome (93039).

The spelling of 399889041 in words is "three hundred ninety-nine million, eight hundred eighty-nine thousand, forty-one".